Introduced: 2004-05-04
Description: New high end graphics chip succeeding the R350/R360 based on a completely new design also known as project Loki. Was to be shown at Comdex in November-03, but was only shown to NDA-signing people on CeBIT-04 and launched to the rest of us in May. Was earlier said to support unified DX 9.0c and Pixel and Vertex Shaders 3.0, but only DirectX 9.0b is supported.
The R420 is a simplified version of the R400 (now R500) to get a new high-end chip out quicker. R420 still uses 24 bit precision (96 bit in total) but adds 3Dc compression.
Native PCI-Express support shows up in the R423 (X800 PCI-E), formely known as X880 on June 1st.
Two versions are launched: The X800 Pro includes 12 pipelines with availability now, while the X800 XT uses 16 and ships on May 21st. A low cost X800 SE with only 8 pipelines is also planned. Previously known as R420.Type: Graphics [Roadmap] [Timeline]
State: Released
Die size ~257 mm2 Process 130 nm low-k Core speed 475 - 520 MHz Transistors 160 M Price $399 - $499 Pipelines 12-16 Memory DDR450, 256 bit DDR-II, GDDR2, GDDR3 0.9 - 1.12 GHz AGP AGP8X, PCI-Express Type Desktop Fill rate 5.7-8.3 Gpix/s, 5.7-8.3 Gtex/s RAMDAC 2x400 MHz + DVI 1.0 DirectX 9.0b Core Loki Triangles/s 475-520 M Vertex shaders 6 x 2.0 Pixel shaders 16 x 2.0
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2003-12-19 ATi Mobile GPU Plans For 2004 VR-Zone Hardware [rm]
2003-12-19 ATI's R420 details emerge, and emerge again The Inquirer [rm]
2003-12-19 ATI to mass produce R420 graphics chip in 1Q DigiTimes [rm]
2003-12-19 ATI R420 to ship late Q1 2004 The Register [rm]
2003-12-03 ATI's shift to 32-bit precision close, says company chief The Register [rm]
2003-12-02 ATI R420 to Support 32-bit Precision for Pixel Shaders?: More Details About R420 and R500 Transpire Xbit Labs [rm]
2003-11-01 TSMC to Ramp Up 0.11 Micron Production in Q2 2004: Will ATI R450 be at 0.11 Micron? Xbit Labs [rm]
2003-10-13 ATI's R420 and Nvidia's NV40 to arrive next year The Inquirer [rm]
2003-09-24 Do we have shots of NV40 and the R420 here?: And GDDR3... The Inquirer [rm]
2003-09-12 nVidia and ATI's next-generation parts delayed until 2004 GEEK.com [rm]
2003-09-09 Not For Idiots: Interesting site for GPU/VPU info. NFI [rm]
2003-08-28 NV36 and NV38 to be Showcased at Computex 2003?: No NV40 This Year? Xbit Labs [rm]
2003-08-13 Big Blue to make NV36, NV40 chips The Inquirer [rm]
2003-07-11 ATI's R420 may be introduced this year: Will both ATI and nVidia use Comdex to introduce next-generation parts? GEEK.com [rm]
2003-07-11 ATI gears up for Q3, Q3 chip launches The Register [rm]
2003-07-10 ATI is Getting Ready to Attack Again: Also ATI RV420 Plans Unveiled Xbit Labs [rm]
2003-06-23 IBM-made Nvidia NV40 will hit the market by year-end DigiTimes [rm]
2003-06-19 ATI R420: Two Times Faster Than The RADEON 9800 PRO: And Using The Same Technology! Xbit Labs [rm]
2003-06-19 ATI's R420 likely to use .13 micron process The Inquirer [rm]
2003-06-16 ATI RV380 to Come With R420: Another Mainstream Design With Boosted Speed Xbit Labs [rm]
2003-06-13 ATI's new secret weapon is the R420: The R400 died in action The Inquirer [rm]
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